Valve for gas or other pipes.



No. 727,205. PATENTED MAY '5, 1903. B. s. 110013 & c. s. DBMAREST5 VALVE FOR GAS OR OTHER PIPES.

APPLICATION FILED DEC. 6. 1902.

N0 MODEL.

ilt:

UNITED STATES Patented May 5, 1903.

PATENT OFFICE.

EDWARD S. ROOT AND CHARLES S. DEMAREST, OF NEW YORK, N. Y.

VALVE FOR oAsfo'RoTHER PIPES.

SPECIFICATION forming part of LettersfPiatent l q'o. 727,205, dated May 5, 1903. Application'filed December 6,1902. Serial 1r... 134,097. (No model.)

To aZZ whom it may concern: 1

Be it known that we, EDWARD S. Row and I CHARLES S. DEMAREST, citizens of the United States, and residents of the borough of Manhattan, in the city, county, and State of New York, have jointly invented a new and useful Improvement in Valves for Gas or other' Pipes, which invention is fully set forth and illustrated in the following specification and accompanying drawings.

The object of this invention is to provide a valve of simple construction for use in pipes conveying gas, oil, ammonia, or other fluids which will automatically close and stop the passage of fluid through the pipes when the temperature rises to a certain point and which can also be closed by hand and locked in its closed position whenever desired.

The valve herein described is an improvement upon or modificationof the valve de-' scribed in Letters Patent No. 679,543, issued to us July 30, 1901.

The invention will first be described in do tail and then set forth in the claims.

In the accompanying drawings, Figure 1 is a view in longitudinal vertical section, showi n g our improved valve as it is applied to a pipe, the valve being shown in its open position. Fig. 2 is a View in plan of Fig. 1. Fig. 3 is a view in side elevation, showing the usual arrangement of a fluid-meter (such as a gasmeter) and its connecting pipes with our valve in position. v

In said figures the number 1 indicates the valve-casin g provided with two threaded sockets 2 3 for connection, respectively, to inlet and outlet pipes. Within the casing 1 is inserted a rotary plug-cock 4, having formed therein ports or passage-ways 5 6 for permittingthe passage of fluid therethrough. The plug 4 is cast with an open bottom and cored out, as shown, to present a hollow interior, in which is formed an internal valve-seat 7.f Inserted within the hollow plug 4 is a lifting valve 8, provided with an upper valve-stem 9 and with a shorter lower Valve-stem 10. The lower stem 10 extends downward through a casing or guide-block 11, which isscrewedto the plug 4 within its hollow interior. Said guideblock 11 serves as a guide for thevalve-stem 10 and is provided on its upper surface with '13," which surrounds the stem 10. valve-stem 9 extends upward through a hole in the top of the plug 4 and through a nut 14 castthereon, the upper part of the nut 14 be- .cap composed of two parts 16 17.

a recess 12, adapted to receive a coiled spring The upper ing hollowed out, as shown, so as to form a The casing 15 is screw-threaded, as shown,and upon it is screwed a removable The part 16, which engages the top of the valve-stem 9 and forms a bearing-plate therefor when the valve is open, is secured to the part 17 at through the holes 21 23 the plug will be locked in its closed position.

The various parts are assembled by inserting the valve 8, with its stems 9 10 and spring 13, within the hollow plug 4 and screwing into place the guide-block 11, thus closing the valve 8 in its seat 7. The upper valve-stem 9 will then project into and above the casing 4 15, and by screwing into place the fpsible cap composed of the two parts 16 17 the contact between the part 16'and the valve-stem will,

as the cap is screwed into place, force the sage of fluid through its ports 5 6 and past the valve 8.

The valve may be placed in any desired position in a line of pipe; but if used in connection with gas-pipes and aga's meter it should be placed, as shown in Fig. 3,-in the gas-supply pipe 24, leading to the gasrmeter 25. The discharge-pipe or house supply-pipe is indicated at 26, the number 27 indicating through both valves 4 8.

the lead-pipe connections, which are usually employed for connecting the pipes 2426 with the meter 25.

The operation'of the valve is as follows: When the temperature has risen (owing to the breaking out of a fire in the vicinity of the valve) to the melting-point of the solder employed in the fusible cap 16 17, said solder will fuse, and the bearing-plate 16 'of said cap in contact with the valve stem 7 will be forced off the part 17 by reason of the spring 13 being released from compression. Said spring will thus instantaneously force the valve 8 into its seat 7 and cut off all passage of gas or other fluid through the pipe 24 and If, therefore, the valve be placed as shown in Fig.3, it will have automatically closed before the heat of the the has reached the point sufficient to melt the meter 25 or any of the lead-pipe conuections 27, and no subsequent destruction of the meter or lead pipes will allow gas to escape into the building. In order to reset the valve 8 after it has closed automatically, it is only necessary to solder anew bearingplate 16 upon the part 17 of the cap and rescrew the cap upon the casing 15.

If it be desired, as is sometimes necessary, to cut 0E by hand the supply of fluid through the pipe 24, a wrench is applied to the nut 14 on the plug-cock 4 and said plugrotated until its ports 5 6 are no longer in line with the openings 2 3. This will stop the passage of all fluid throughth'e plug 4 and through the valve 8, and it the locking-lugs 20 22 be secured together by a lock the whole valve is locked and the pipe closed to the passage of fluid until the plug 4 is again turned by'hand into its open position. The automatic valve 8 may also be closed by hand whenever desired by simply unscrewing the cap 16 17 from the casing 15, and by replacing said cap the valve will be reopened.

From the above description it will be seen that our valve structure consists, essentially,

of two valves,-one located within the body of the other, one of said valves being adapted to be opened and closed by hand and the other adapted to be opened by hand and closed automatically. A combined valve so arranged possesses all the advantages of the valve described in our former patent above referred to and in addition presents all the advantages gained by the use of a rotary plugcock,which is regarded by many as the most eflicient type of valve for cutting off by hand the supply of gas and other fluids through pipes.

We do not limit ourselves to the precise constructionand arrangement of the several parts shown, as it is evident that such construction and arrangement may be varied without departing from the essence of our invention. I

Having thus fully described our invention, we claim 1. In a valve structure, the combination of a hollow hand operated valve, having a trans verse valve-seat on its interior; and an automatic valve located Within said hand-operated Valve.

2. In a valve structure, the combination of a hollow rotary valve having a transverse valve-seat on its interior; a lifting-valve within said rotary valve; and means for closing said lifting-valve automatically.

3. In a valve structure, the combination of a valve-casing provided with inlet and outlet openings; a hollow rotary plug within said casing, provided with an internal transverse valve-seat a valve within said plug, provided with a stem; andfusible means for engaging said stem and holding said valve open.

4. In a valve structure, the combination of 'a valve-casing provided with inletand outlet openings; a hollow rotary plug, within said casing, provided with an internal valve-seat;

a valve within said plug,provided with a stem;

and a bearing plate or support, for holding said valve open, securedin place by fusible metal. v v

5. In a valve structure, thecombination of a valve-casing provided with inlet'and outlet openings; a hollow rotary plu'g within said casing, provided with an internal transverse valve-seat; a valve within said plug, provided jwith a stem; a spring surrounding said stem; and fusible means for engaging said stem and holding the valve open against thepressure of said spring.

6. In a valve structure, the combination of 7. In a valve structure, the combination of 'a valve-casing provided with inlet and outlet jopenings'; a hollow rotary plug within said casing provided with an internal valve-seat; a valve within said plug provided with a "stem; a bonnet for said stem; and a cap for said zbonnet, provided with a bearing-plate for said valve-stem, said bearing-plate being secured to the cap by fusible metal.

8. In a valve structure, the combination of a valve-casing provided with inlet and outlet openings; a hollow rotary plug within said casing, provided with an internal valve-seat; a valve withinsaid plug provided with a stem; a spring surrounding said stem; abonnet for the stem; and a cap for said bonnet, provided with a bearing-plate for said stem, said bearing-plate being secured to the cap by fusible metal.

9. The combination of a valve-casing provided with inlet and outlet openings; ahollow rotary plug within said casing provided with an internal valve-seat; a valve within said plug provided with a valve-stem on each side; a spring surrounding one of said stems the other valve-stem provided with a cap; and a bearing-plate, secured to said cap by fusible metal, for engaging the other valvestem and holding the valve open against the 5 pressure of the spring.

EDWARD S. ROOT. CHARLES S. DEMAREST.

Witnesses CHAS. A. BENEDICT, CLARENCE A. BENEDICT. 

